The population of the double-crested cormorant is higher at Grand Lake than state officials would like; last year 80 nesting pairs were counted. The bird's droppings are toxic to trees and some plants, and large flocks can reduce fish populations in some areas.

CELINA - State wildlife officials are closely monitoring the increasing number of double-crested cormorants at Grand Lake to ensure the invasive waterfowl doesn't wipe out other species.
The birds' droppings are toxic to trees . . .